diff --git a/tools/math.py b/tools/math.py
index 92ad48c..5bf6a2c 100644
--- a/tools/math.py
+++ b/tools/math.py
@@ -1,3 +1,4 @@
+import math
 from decimal import Decimal, ROUND_HALF_UP
 from .types import Numeric
 
@@ -5,3 +6,13 @@ from .types import Numeric
 def round_half_up(number: Numeric) -> int:
     """ pythons round() rounds .5 to the *even* number; 0.5 == 0 """
     return int(Decimal(number).to_integral(ROUND_HALF_UP))
+
+
+def get_factors(num: int) -> set:
+    f = {num}
+    for x in range(1, int(math.sqrt(num)) + 1):
+        if num % x == 0:
+            f.add(x)
+            f.add(num // x)
+
+    return f